Communication of 12.VI.2018
Telephone numbering plan
The Basic Technical Numbering Plan (“Numbering Plan”) was published in the Official Gazette of the Federation on 21 June 1996. It lays the foundation for proper administration and use of national numbering in that it allocates the available resources efficiently, fairly, equitably and in a non-discriminatory fashion. Its adoption enabled the country to increase its numbering resources, re-organize existing allocations, harmonize the criteria for allocating long-distance codes and comply with the relevant international recommendations.
On 12 November 2014, the Official Gazette of the Federation published the Agreement of the Plenum of the Federal Institute of Telecommunications issuing number portability rules and modifying the Basic Technical Numbering Plan, the Basic Technical Signalling Plan and the operational requirements for the introduction of geographic and non-geographic number portability.
On 11 May 2018, the Official Gazette of the Federation published the Agreement of the Plenum of the Federal Institute of Telecommunications approving and issuing the Basic Technical Numbering Plan, the Basic Technical Signalling Plan and modification of the number portability rules published on 12 November 2014. These new plans will enter into force on 3 August 2019.
In particular, the new Numbering Plan envisages replacing the concepts of local and geographic numbers with that of national numbers; eliminates the concept of regional codes to delimit geographic areas for the purposes of number assignment and use, adopting in their stead a geographic division of 8 (eight) areas; establishes the need to accredit 85 per cent (eighty five per cent) usage of numbers previously assigned to a specific mode of use and inside one area in order to allocate additional numbering resources to telecommunication service providers (“Providers”).
Additionally, it establishes electronic procedures for the handling and management of procedures related to numbering resources and clear, detailed and concise assessment criteria for their sources; eliminates long-distance originating operator identification codes (ABC) and maintains the assignments of long-distance destination operator identification codes (BCD) — however, these will be used as identification codes for the local originating and destination network (IDO/IDD); requires all fixed and/or mobile service providers to have an administrative identification code (IDA); and incorporates the mobile network code (MNC) assignment procedure.
The new Numbering Plan also requires the submission of bimonthly disaggregated reports on the use of national numbers/non-geographic numbers assigned directly and monthly disaggregated reports on the use of numbers provided by other licensees; it establishes a procedure for the return of numbering resources where the use of one or more national number blocks is not required, their use is not initiated within the set period, a usage of less than 51 per cent (fifty one per cent) is reported for six successive two-month periods, in cases of public interest or national security, as well as pursuant to any legal provision, administrative decision or regulation issued for that purpose.
Furthermore, it establishes a uniform 10-digit dialling procedure for the entire national territory, whether for fixed-line or mobile calls; eliminates the prefixes: 01, 02, 044 and 045; eliminates the prefix 1 in dialling procedures for incoming international calls to mobile numbers in the “calling party pays” mode; and eliminates groups of special service codes and the selection by prior subscription service.
Areas
For the purposes of number assignment and administration, the national territory is divided into eight areas. Thus, all national numbers beginning with the same digit belong to the same area.
The areas are as follows:
|
Area
|
Area number
|
|
East
|
2
|
|
West
|
3
|
|
North
|
4
|
|
Central
|
5
|
|
North-West
|
6
|
|
South-West
|
7
|
|
North-East
|
8
|
|
South-East
|
9
|
With the division of the national territory into areas, for the purposes of number assignment and administration, resources currently allocated to Providers, and those to be assigned, may be used in any population centre that the Provider considers appropriate, bound only by the geographic limits of the area.
National numbering
Structure of national numbering
National numbers shall comprise 10 digits and take the following form:
|
National numbers
|
|
Area number (1 digit)
|
9 digits
|
|
A
|
b c d e f g h i j
|
Where:
A = 2, 3, 4, …, 9
b = 1, 2, 3, …, 9
c, d, e, f, g, h, i, j = 0, 1, 2, 3, …, 9
No national number shall begin with the sequence 9-1-1.
Dialling procedures
The dialling procedure for domestic calls originating from numbers in fixed-line, CPP mobile and MPP mobile (called party pays) modes is as follows:
|
Destination number modes of use
|
Dialling procedure
|
|
Fixed-line
|
10-digit national number
|
|
MPP mobile
|
|
CPP mobile
|
Non-geographic numbering
Structure of non-geographic numbers
Non-geographic numbers shall comprise 10 digits and take the following form:
|
Geographic numbers
|
|
10 digits
|
|
Non-geographic service code
(3 digits)
|
User number
(7 digits)
|
|
A0N
|
d e f g h i j
|
Where:
A = 2, 3, …, 9
N = 0, 1, 2, …, 9
d, e, f, g, h, i, j = 0, 1, 2, …, 9
Dialling procedure
The dialling procedure for calls to non-geographic numbers is as follows:
|
Non-geographic numbers
|
|
10 digits
|
Non-geographic service keys
The keys assigned for non-geographic services are as follows:
|
Non-geographic service key
|
Description
|
|
200
|
Mobile or fixed satellite telephone service with payment at the point of origin (geostationary systems)
|
|
201
|
Mobile or fixed satellite telephone service with payment at the point of origin (low-orbit systems)
|
|
300
|
Services with charges shared between the points of origin and destination
|
|
500
|
Personal numbers with call transfer; the user making the call pays the local access tariff and the user receiving the call pays the difference
|
|
700
[1]
|
Access numbers for each operator’s virtual private network
|
|
800
|
Non-geographic numbers with reverse charging
|
|
900
|
Non-geographic numbers with surcharge for the service provided
|
A0N combinations not defined in the table above remain available for other non-geographic services, which must follow the procedures for the creation of new keys.
Special service codes
Structure of special service codes
Special services may be provided by Providers or government entities.
Special service codes use the following structure:
|
Special service codes (3 digits)
|
|
0NX
|
Where:
N
= generic for special service provided = 1, 2, 3, …,9
X
= 0, 1, …,9
Any numbering sequence of two or more digits other than those already established or the sequence used as prefix for access to the long-distance international service (00) may be used by Providers as long as they do not clash with the national and non-geographic numbering assigned by the Institute. For the services they provide their users directly or via third parties, Providers may use “#”, “*” and other non-numeric characters, except for the structures “*0NX” and “#0NX”, which are reserved.
Under no circumstances should the sequence “911” be used, or any other sequence which might cause confusion with the national emergency services number, 911, such as *911, #911, etc.
Dialling procedures
The dialling procedures for calls to special service codes are as follows:
|
Special service codes
|
|
3 digits
|
Established special service codes
The established special service codes are as follows:
|
Code assigned
|
Special service
|
Special service provider
|
|
010- 019
|
Available
|
|
|
020
|
Operator call assistance service
|
Telecommunication service providers
|
|
021-029
|
Available
|
|
|
030
|
Exact time
|
Telecommunication service providers
|
|
031
|
Alarm clock
|
Telecommunication service providers
|
|
032-039
|
Available
|
|
|
040
|
Information on national telephone numbers
|
Telecommunication service providers
|
|
041-049
|
Available
|
|
|
050
|
Complaint reception and processing
|
Telecommunication service providers
|
|
051
|
Generation of PINs
|
Telecommunication service providers
|
|
052-069
|
Available
|
|
|
070
|
Community information
|
Government entities
|
|
071
|
Electricity services
|
Government entities
|
|
072
|
Public service reports and complaints
|
Government entities
|
|
073
|
Drinking water and sewage system
|
Government entities
|
|
074
|
Traffic information
|
Government entities
|
|
075
|
Guidance and support for personal safety
|
Government entities
|
|
076
|
Available
|
|
|
077
|
Federal entity and election bodies
|
Government entities
|
|
078
|
Tourist information
|
Government entities
|
|
079
|
Available
|
|
|
080-087
|
Available
|
|
|
088
|
Federal public security services
|
Government entities
|
|
089
|
Whistle-blowing service
|
Government entities
|
|
090
|
International long-distance service via operator
|
Telecommunication service providers
|
|
091-099
|
Available
|
|
The single number used throughout the country for emergency services comprises three digits and takes the following form: 911 (nine, one, one).
Special service codes should be available for dialling from any national line. To that end, all Providers must follow up the changes in the corresponding routing matrices and update their systems accordingly in order to ensure access and correct routing for calls made to the special service numbers.
Providers must provide free and unrestricted access to the following services, including for, but not limited to, telephones of users without credit or with restricted service and public telephones: receipt and processing of complaints (050), generation of PINs (051), federal public security services (088), whistle-blowing service (089), single emergency service number (911).
Dialling procedure for international long-distance services
Access prefix for international long-distance service
The access prefix for the international long-distance service to be used by all Providers is as follows:
|
Prefix
|
Purpose
|
|
00
|
Automatic international long-distance call
|
Dialling procedures for outgoing international calls
The dialling procedures for calls to international users’ numbers and non-geographic numbers of other countries are as follows:
|
International long-distance calls
|
|
00 + International number
|
|
Calls to international non-geographic numbers
|
|
00 + International non-geographic number
|
The international non-geographic number includes the country code. International non-geographic number services may be restricted by international agreements between operators.
Telecommunication service provider identification codes
Providers must have the necessary identification codes for performing billing, call routing and portability functions. To that end, the Institute shall assign to each Provider the identification code required for its activities, except for the code 000, which will be held in reserve.
Originating network identification code (IDO)
Public telecommunication networks originating traffic must have an IDO code so that there is sufficient information in the signalling exchanged regarding to whom the traffic’s interconnection charges should be billed.
The IDO code comprises 3 digits and takes the following form:
|
Originating network identification code
|
|
IDO (3 digits)
|
Where:
I
= 0, 1, 2, …, 9
D
= 0, 1, 2, …, 9
O
= 0, 1, 2, …, 9
Destination network identification code (IDD)
Public telecommunication networks carrying out traffic termination activities must have an IDD code so that there is sufficient information in the signalling exchanged for the user’s destination network to be identified in order to ensure delivery.
The IDD code comprises 3 digits and takes the following form:
|
Destination network identification code
|
|
IDD (3 digits)
|
Where:
I
= 0, 1, 2, …, 9
D
= 0, 1, 2, …, 9
D
= 0, 1, 2, …, 9
Administrative identification code (IDA)
Companies must have an IDA code in order to be identified as a Provider with numbering assigned by the Institute or provided by another licensee and used under any commercial agreement.
The IDA code comprises 3 digits and takes the following form:
|
Administrative identification code
|
|
IDA (3 digits)
|
Where:
I
= 0, 1, 2, …, 9
D
= 0, 1, 2, …, 9
A
= 0, 1, 2, …, 9
No IDA code used by a company may be the same as an IDO/IDD code assigned to a licensee.
Mobile network codes
IMSI structure
The International Mobile Subscription Identity (IMSI) serves to identify a single subscription. It comprises 15 digits, grouped into three fields, and takes the following form.
|
Mobile Country Code
(MCC)
3 digits
|
Mobile Network Code
(MNC)
3 digits
|
Mobile Subscription Identification Number
(MSIN)
9 digits
|
|___________________________________MSI__________________________________________|
Where:
The
MCC i
s the first three digits of the IMSI and represents the
mobile country code
. The MCC assigned to Mexico by ITU is 334.
The
MNC
is the next three digits of the IMSI and represents the
mobile network code.
It is administered by the Institute and assigned to mobile service providers.
The MSIN makes up the last nine digits of the IMSI and represents the
mobile subscription identification number
. The MSIN is administered directly by the mobile providers that have an MNC assigned by the Institute.
Providers requiring IMSI resources must apply to the Institute for the assignment of an MNC allowing them to clearly identify the mobile network in such a way that they can administer the MSINs of the entire IMSI block.
[1]
The non-geographic numbers corresponding to this service shall be independently administered by each operator.
